Car-brake



(No Model.)

A. B. POOL & J. J. BEALS.

OAR BRAKE.

Patented Feb. 24, 189 1.v

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' UNITED STATES PATENT OFFIcE.

ANTHONY B. POOL AND JOSEPH J. BEALS, OF BOSTON, MASSACHUSETTS.

CAR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 446,981, dated February 24, 1891.

Application filed June 26 1890. Serial No. 356,753. (No model.)

Figure 1 is a sectional elevation showing the end of a street-car provided with ourimprovement, and Fig. 2 a side elevation of the same.

Like letters and figures of reference indicate corresponding parts in the different fig-l ures of the drawings.

Our invention relates to a brake mechan ism for street-railway cars; and it consistsin certain novel features hereinafter fully set forth and claimed, the object being to pro duce a simpler, cheaper, and more effective device of this character than is now in ordinary use. 1

The nature and operation of the improvement will be readily understood by all conversant with such matters from the following explanation.

In the drawings, A represents the body of the car, B the dasher, and O the truck considered as a whole, these parts being of the ordinary form and construction. A horizontally-arranged worm or endless screw D is fitted to rotate in brackets d, secured to the bottom of the car, the threads of said Worm running from the center f to the ends in opposite directions. zontally-arranged rods 9 are secured in the brackets d, respectively, above and below the worm D. Two blocks he are fitted to slide on said rods 9, and are threaded to respectively travel on the worm-sections m p. The brake-beams q r are pivoted to the car-body in the usual manner, and rods 13 o, respectively, connect the blocks h i with said beams. On the outer end. of each of said rods an elliptic spring w is secured centrally, the ends of said spring bearing against the brakebeams and cushioning the pull of said rods. From each end ofthe worm D a rod 00 leads Two parallel hori-' to the platform, the outer ends of said rod being mounted in a bracket g on the lower end of the dasher B. On the upper edge of the dasher a small shaft 2 is mounted, which bears a sprocket-gear 15, which is connected by a chain 16 with a similar sprocket 17 on each rod as. A hand-wheel 18 is mounted on the shaft 2.

In the use of our improvement, by turning said handle the worm D is rotated, causing the blocks hi to travel thereon and draw the beams q rinward,the shoes 20 on said beams being thus forced into engagement with the car-wheels and braking the car in the ordinary manner. By rotating the handle in the opposite direction said blocks h 'i are moved outward on the worm, freeing the brakeshoes.

The springs w on the'brake-beams permit a slight lost motion to the shoes and prevent too great a strain on the rods to.

Having thus explained our invention, What we claim is 1. In a car-brake, a right and left hand vworm fitted to rotate on the car-body, mechanism for actuating said worm from the carplatform, blocks fitted to travel in opposite directions on said worm, rods respectively connecting said blocks with the brake-beams, and springs on the outer ends of said rodsin engagement with said beams, substantially as described.

2. The combination of the car and truck with the worm D, fitted to rotate in hangers on the car-body,.the blocks 72. '6, traveling on said worm, the rods to, connecting said worm with the brake-beams, springs on the outer end of said rods in engagement with said beams, and means, substantially as described, for rotating said worm.

3. The combination of the car with the Worm D, fitted to rotate thereon, the block h 1', traveling on said worm, the rods t '0, connecting said blocks with the brake-beam, and the sprockets 17, mounted on said worm and connected by chains with a handle-sprocket on .the ear-dasher, substantially as described.

ANTHONY B. POOL. JOSEPH J. BEALS. Witnesses:

IoNE RYAN, MARY E. PIERCE. 

